Lapping or honing



July 21, 1942.

Filed May 16, 1939 R. H. CRAMER 2,290,541

LAPPING 0R HONING 2 Sheets-Sheet l Fig. 1

/NVENTOR." RA YMOND H CRAMER,

HIS ATTORNEY.

Jui? 21, 1942. R. H. CRAMER LAPPING OR HONING Filed May 16, 1939 2 Sheets-Sheet 2 V/N\I/EN TOR RAYMOND H. CRANE HIS ATTORNEY.

Patented July 21, 1942 UNITED-4 STATES PATE mrrm General Motors corporation o! tes to lapping or honingand e features and aspects of This invention rela a lapping s. 8 and 9 are sectional views of other bear- I t can be rotateda ome parts in secmgs.

Fig. 10 is a sectional view of the bearing of Fig. 7 with the inner race and. honing 'device in another position. Fig. 11 is a plan view of a lapping device. Fig. 12 is a sectional view of Fig. 11. a Fig. 13 is a plan view ofa modified lapping device. Fig. 14 is a sectional view of Fig. 13. v Fig. 15 is a sectional view of the lap of Fig. 13 in lapping relation to a bearing. I I In Fig. 1, a frame member In is provided with bearings fora vertical shaft l2 which is sup ported and rotated in any suit pulley. The upper end of the and tapped to receive a-screw stud l3 projecting downwardly from a work support l4 provided with a circumferential centering flange l6. Fastened by screws to able -way,-asby a shaft is recessed bya split to a flange will appear." the inner racering, engagesthe support it is a friction the thicker end ofan,

for example." The race-* I nt' and is engaged by bar r series byj i engage and conform :8; ce 26. j 'l'heirollersc'anbe or the bearing or special trunnions 88 the center 8 0 of rac p, 7 are'slipport-ed" 1 by lugs 99 projecting-from -a-=;standard 92.. The is v a" usin o dlat.slfytoia link. '6. 5- -which. -ijsf alsopivoted on aic ank pin so which-is eccentric a; driven belt-w-pulley' I 00' a which ""r0-' tate'sonfaflxed I Q Figs. oscillating- 2.290541 OFF C Raymond B. Cranier, Newark. N. J... Corporation. v Delaware-. 1

Application m y -l6,-1939, Seriai 0 8 Claims. (01. 51-26 vj there a centering proi ct nlu gilt-tn? ng part'siQ'I-he 4 and 5 illllstl eiiect oscillationf 1 vrieu e e directions of rotation.

to receive and guide rotating at least one I08 carried by a piston rod llll projecting from a lifting cylinder 2. The weighted pulley or pressure member is lifted to facilitate insertion or removal of work, the shaft 02 being slidable in the sleeve N. The fixed axis of oscillation provided by the trunnions It is perpendicular to the axis of shaft .2 and to the axis of rotation of the outer race rin Figs. 6 and '1 illustrate a self-aligning bearing having an outer race ring, and caged lappin rollers.

ent and rotation of one race ring can be dispensed with. Fig. 8 indicates a taper roller bearing capable of being lapped by the mechanisms shown in Figs. 1 and 2. Fig. 9 shows another type of self-aligning bearing capable of being lapped by the mechanisms shown in Figs. 1 to 5. Fig. 10

with the inner race ring and roller lap in one of the tipped positions. In'the case inner race ring alone will be oscillated by the mechanisms of Figs. 3, 4 and and such ring will wipe along the roller laps as it oscillates."

Figs. 11 and 12 show a split type lap comprising a ring split as at I20. The internal surface I22 conforms to the contour of the inner race ring of Fig. and is slotted radially at a number of points as at H4. The external surface I26 conforms to the contour of the outer raceway and is slotted radially at a number of points as at I28.

Such a lap is springy and yielding and can be substituted for the roller lap of Figs. 1 to 5.

Figs. 13, 14, and show a shoe type lap comprising a ring In with a series of internal radial recesses in to receive and guide shoes I34, each shoe being urged inwardly by a coil spring I38 surrounding a stud I38 on the ring I". The inner surfaces of the shoes conform to the contour of the inner raceway of Fig. 10. The ring I30 also has a series of external radial recesses Ii shoes I42, each shoe bein urged outwardly by a coil spring I surrounding a stud I. The shoes In conform to the contour of the outer raceway. Cast iron, brass or abrasive are suitable materials for the lapping device.

I claim:

l. The method of lapping the contoured raceways of inner and outer selfbearing rings of different diameters, which consists in interposing a contoured lapping device in the annular space between the raceways, rotating at least one of the race rin upon its axis, pressing one of the race rings towards the other to create pressure between the lapping device and the race. ways, and oscillating one of the race rings around a fixed axis at the center of curvature of one of the raceways; substantially as described.

The me ppin the contoured inner and outer raceways of selfbearing rings, which consists in interposing a contoured lapping device in the annular space between the raceways, of the race rings upon its axis, pressing one of the race rings towards the other to create pressure between the lapping device and the raceways. and swing l the lapping device and one race ring as a unit around the center of curvature of the raceway on the other race ring; substantially as described 3. In a machine for lapping the contoured raceways of bearing race rings of different diameters, means for supporting and rotating the outer race ring upon its axis, means for suppor ing and rotating the inner race ring upon its axis, a lapping device pressed/between the raceways and conforming to them, and means for causing relative oscillation around another axis between one of the race rings on the one hand and the other race ring and the lapping device on the other hand, said other axis bein perp ndicular to the axis of said other race ring; substantially as described.

4. In a machine for lappin the contoured raceway of a bearing race ring, means for supporting and rotating the race ring upon its axis, a lapping device comprising a circular series of lapping elements spaced apart circumferentially of the race ring and. conforming to the raceway, means for pressing the lapping device against the raceway, and means for'causing' relative oscillation.between the lapping device and the race ring around a fixed axis passing through the center of curvature of the raceway, said fixed axis being perpendicular to the race ring axis and intersecting the latter; substantiallyas described.

5. In a machine for lapping the contoured raceway of a bearing race ring, a rotary support for the race ring, a lapping device comprising a series of individually rotatable lapping rollers engaging the raceway, a pressure member for urging the lapping device against the raceway, and a crank for oscillating the pressure member around a fixed axis passing through the center of curvature of the raceway at right angles to the race ring axis; substantially as descri 8. In a machine for lapping the raceway of a bearing race ring, a support for the race ring, a lapping device cl ngin the raceway, a pressure member for urging the lappin device against the raceway, meansfor rotating the pressure member around its axis, a driving pulley out of line with said axis, and a ball offset with respect to the pulley and connecting the pulley and the pressure member to cause the pressure member to change its axis of rotation; substantially as described.

7. In a machine for lappin the raceway of a bearing race ring, a support for the race ring. a lapping device enga in the raceway, a pressure member for urging the lapping device against the raceway, means for rotating the pressure member around its axis to cause! the lappin device to travel circumferentially of the raceway, a sleeve rotatably supporting the pressure member, and means for oscillating the sleeve' back and forth about a fixed axis to cause the lappin device to oscillate crosswise of the raceway while partaking of said circumferential travel; substantially as described.

8. In a machine for lapping the raceway of a bearing race ring, a rotary support for the race ring, a lapping device enssglng the raceway, a pressure member for urging the lapping device against the raceway, means for rotating the pressure member around its axis to cause the lapping device to travel circumferentially of the raceway, a sleeve rotatably and slidably supporting the pressure member, and a device for shiftin the pressure member axially with respect to the sleeve for sliding movement toward or from the race ring to provide space for removal or insertion of the lapping device therebetween; substantially as described. 

